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An identity related to Jordan's inequality

The main purpose of this note is to establish an identity which states that the function sinx/x is a power series of (π2−4x2) with positive coefficients for all x≠0. This enable us to obtain a much stronger Jordan's inequality than that obtained before.

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Kaituhi matua: Jian-Lin Li
Hōputu: Artigo
Reo:Inglês
I whakaputaina: Wiley 2006-01-01
Rangatū:International Journal of Mathematics and Mathematical Sciences
Urunga tuihono:http://dx.doi.org/10.1155/IJMMS/2006/76782
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